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To: Linus Torvalds <torvalds@transmeta.com>
Cc: David Woodhouse <dwmw2@infradead.org>, davem@redhat.com,
        linux-kernel@vger.kernel.org
Subject: Re: recalc_sigpending() / recalc_sigpending_tsk() ? 
In-Reply-To: Message from Linus Torvalds <torvalds@transmeta.com> 
   of "Fri, 01 Mar 2002 08:49:07 PST." <Pine.LNX.4.33.0203010838360.3798-100000@home.transmeta.com> 
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Date: Fri, 01 Mar 2002 17:40:26 +0000
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From: David Howells <dhowells@redhat.com>
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> So I would suggest solving this problem by just adding something like
> 
> 	/* Block all signals except for mask */
> 	void sigallow(unsigned long mask)
> 	{
> 		spin_lock_irq(&current->sigmask_lock);
> 		siginitsetinv(current->blocked, mask);
> 		recalc_sigpending();
> 		spin_unlock_irq(&current->sigmask_lock);
> 	}
> 
> and be done with it. That seems to be what most of the non-signal.c users
> actually _want_.

Maybe you should return the old mask too?

David
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